Drop column fails with ORA-39726,Exchange partition fails with ORA-14278 if partition table has unused column (Doc ID 2054896.1)

Last updated on AUGUST 08, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.

Symptoms

 1,with compressed subpartion and drop column fails:

SQL>alter table <table_name> drop column <column_name>;
ORA-39726: unsupported add/drop column operation on compressed tables

2,Excahnge partition fails with:

SQL>ALTER TABLE subpart_table EXCHANGE SUBPARTITION <partition> WITH TABLE
<table_name> INCLUDING INDEXES WITH VALIDATION;

ORA-14278: column type or size mismatch in EXCHANGE SUBPARTITION

3,Logical delete can be done:

SQL>alter table <table_name> set unused column <column_name>;

 

Cause

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